📖 What Does P0134 Mean?
The upstream oxygen sensor on bank 1 shows no activity or switching between rich and lean conditions.
Symptoms
Poor fuel economy, rough idle, failed emissions test, check engine light, poor performance.
Common Causes
Failed oxygen sensor, open circuit in wiring, no power to sensor heater, completely contaminated sensor.
Possible Solutions
Replace oxygen sensor, repair open circuits in wiring, check sensor heater power supply, inspect for contamination.
Recommended Parts & Tools
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📦 Parts Needed
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Frequently Asked Questions about P0134
How serious is P0134?
This code has a medium severity level. This should be diagnosed and repaired soon to prevent further issues.
Can I drive with P0134?
You can typically drive short distances, but have it diagnosed as soon as possible.
How much does it cost to fix P0134?
Repair costs vary depending on the root cause, but typically range from $100-300 including parts and labor.
Related Diagnostic Codes
Other codes that may appear with P0134
Oxygen Sensor Circuit Malfunction Bank 1 Sensor 1
Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 1
Oxygen Sensor Circuit High Voltage Bank 1 Sensor 1
Oxygen Sensor Circuit Slow Response Bank 1 Sensor 1
Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Catalyst System Efficiency Below Threshold Bank 1
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system